/*
 * Copyright (c) 2001,2002,2003 Mike Matsnev.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice immediately at the beginning of the file, without modification,
 *    this list of conditions, and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Absolutely no warranty of function or purpose is made by the author
 *    Mike Matsnev.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * $Id: ZipFile.h,v 1.9.2.3 2004/07/07 12:04:47 mike Exp $
 * 
 */

#if !defined(AFX_ZIPFILE_H__CDE86113_3C6F_4FE5_BCEF_F512CA03E3D3__INCLUDED_)
#define AFX_ZIPFILE_H__CDE86113_3C6F_4FE5_BCEF_F512CA03E3D3__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "zlib/zlib.h"
#include "BufFile.h"
#include "RFile.h"

class ZipFile : public RFile  
{
  struct ZFile {
    ZFile	*parent;
    int		off; // offset into zip file, -1 for directories
    union {
      struct { // for plain files
	int	csize; // compressed size, -1 if file is not compressed
	int	size; // uncompressed size, -1 if compression type unsupported
      };
      CMapStringToPtr	*children; // for directories
    };
    ~ZFile();
    bool isdir() { return off<0; }
    bool iscmp() { return csize>=0; }
    void fixup_encoding(int enc);
  };
public:
  ZipFile(const CString& fn);
  virtual ~ZipFile();

  // file operations
  virtual DWORD	  size();
  virtual DWORD	  read(void *buf);
  virtual DWORD	  read(void *buf, long bufsize);
  virtual void	  seek(DWORD pos);

  // compression
  virtual CString CompressionInfo();

  // zip file specific methods
  bool		  SetDir(const CString& dir); // set current zip dir
  bool		  GetNextFileInfo(CString& fname,bool& isdir,__int64& size);
  void		  Reset(); // reset iterator
  bool		  ReadZip(); // load zip file directory
  bool		  Open(const CString& filename); // open file in current dir
  bool		  IsSingleFile(CString *s);
protected:
  ZFile		  m_rootdir;
  ZFile		  *m_curdir;
  POSITION	  m_curpos;
  ZFile		  *m_curfile;
  z_stream	  *m_zs;
  Buffer<Bytef>	  m_in;
  DWORD		  m_ptr;

  void		  rewind();
};

#endif // !defined(AFX_ZIPFILE_H__CDE86113_3C6F_4FE5_BCEF_F512CA03E3D3__INCLUDED_)
